Wagon bolster-spring



(No Model.)

J. W. WETMORE. WAGON BOLSTER SPRING.

No. 252,824. Patented Jan. 24,1882.

llwrrnn STATES PATENT QFFICE.

JEROME W.- -WETMORE, OF ERIE, PENNSYLVANIA.

WAGON BOLSTER=SPR|NG.

SPECIFICATION forming part of Letters Patent No. 252,824, dated January 24, 1882.

Application flied May 14, 1881.

To all whom it may concern Be it known that I, JEROME W. WE'rMoRE, a citizen of the United States, residing at Erie, in the county of Erie and State of Pennsylvania, have invented a new and useful Improvement in Wagon Bolster-Springs, of which the following is a specification.

My invention relates to torsion-springs for bolster-wagons; and the objects of my improvement are, first, to use straight springbars without frictionoints; second, to support the forward and back pressure of the load and lessen this pressure onthe stakes; third, to allow the load to rest temporarily on the bolster in case of very great weight and concussion, to keep the spring-board nearer the bolster; and, fourth, to bring the entire steel of the main bolster-spring into use under both light and heavy loads. 1 attain these objects by the devices illustrated in the accompanying drawings, in which- Figure l is a perspective view of the axle and bolster ol'a lumber-wagon with the springs applied; Fig. 2, a vertical section of the spring and lever-aim through the linear, Fig. l, with a partial view of one of the bearings beyond them; Fig. 3, the same view with the arms of the springs depressed; Fig. 4, a vertical section through y 3 Fig. 1, one of the three sets of supportingarms; Fig. 5, a perspective view of one of the six bearings or holding-blocks c, and lever-arms of the springs with a section of the spring a; Fig. 6, another form of the outer end of the arm; Fig. 7, another form of the end of the elliptical spring. The tongue z hinges in the slotj. Figs. 8 and 9 represent the torsion-spring rod used as the equivalent ofthe spring D; Fig-10, a section across the slots in the holding blocks and arms, showing the slots narrowest at the middle except in the outer ends of the outer blocks.

(No model.)

H is the bolster; K K, the axle. Theholdingblocks 0 are riveted to the plates G, as shown at in, Fig. 5. The bar a is held last by a wedge or set-screw in the middle holding-block. The spring-board E, Fig. 1., passes over the top of the springs D D. The arms and bearings F and c are of malleable iron, and are slipped to their places on the bars. If the spriugbar a bends down too much under a heavy load, concave iron blocks will be placed on the bolster a little below the base of each lever 12, Fig. 2, rounded as at r, Fig. 5, the blocks being held by screws or a strap passing over the bolster. the half-elliptical springs at i and j, to make the slot or tongue. are turned up to make t'riction-bearings on the arm. The end g, Fig. .5, may be bent after the spring D is in place to hold it. The arm S, Fig. 8, will beabout halt the length of the arm F, and its angle with a horizontal line about double of the angle of the arm F with that line. The load rests on E, Fig. 2, and the operation of the springs is ob vious from inspecting Figs. 2, 3, and 5.

What I claim is 1. The spring-bar a, when placed by the side of the bolster and supported in the middle and The cuttings of the ends of at each end without pivot-bearings, and conncctvd by the arms F between the bearings with the bolster-board E, substantially as described. t

2. The spring-supports c 0, with connectingplate G, in combination with the spring a, substantially as described.

3. The spring-bar a, bearings o o. and arms F, in combination will] the arms I) and bolster-board E, substantially as described.

JEROME W. WETMORE.

Witnesses:

' CRAIG T. Bros,

. WM. P. HAYES. 

